The Countdown to Detective Comics #1000 starts here! Batman s strangest case begins as the acclaimed creative team of writer Peter J. Tomasi and artist Doug Mahnke take over Detective Comics! Alfred Pennyworth attacked at Wayne mansion! Who s hunting those closest to Batman? The monstrous shadow plaguing Gotham City gains the upper hand when two of the Dark Knight s most ardent allies fall prey to a violent vendetta! Commissioner Gordon calls in the Dark Knight Detective when there s a murder at the Gotham City Aquarium staged to look exactly like Thomas and Martha Wayne s crime scene, right down to the playbill and pearls. How does this bizarre homicide tie into the shadowy monster that attacks Dr. Leslie Thompkins? This creature looks to wage a war on Batman and it s using Joker Gas to do it! Collects Detective Comics #994-999.